I do not recall the exact fight, but I believe it was from Season 1 and Chuck goes in to his corner and tells his fighter to throw a particular combination ending with an over hand right, the fighter goes out their circles and throws that combination and wins the fight. To me that is great coaching, Chuck used his experience, communicated it well to his fighter, and his fighter accepted and trusted his advice and was successful. To me that is what makes a great coach.

I also have to give an honorable mention to Forrest Griffin. In season 7 he took an under achieving team and beat down Rampage's team. A Rampage team with several UFC fighters after the fact. We saw a rookie Amir Sadollah advance and I can't help but give credit to Forrest's personality and insight meshing well with Amir's personality and took the very young fighter farther than anyone could have expected.

Tito was the best. Remember, when the show was over, he took a lot of those guys to Big Bear w/ him to train more. Plus he made Hamill great (until he left punishment) he also taught the fighters how to act to get recognized (being a heel or face). He really cared for those guys.

Chael is definitely the best coach they've had in recent seasons with the best roster the show's ever had...
However, I still believe that Chuck is worthy of being called the best coach because he has the best record of winners on the show, having gone 3-0.
I would make the same argument for Bisping if his record wasn't 3-1 (Jon Dodson KOing TJ Dillashaw being that 1).

the coaches on TUF job is to get them to the finals once they get there most go back to there own camp's and trainers for the finale like Dillashaw probably went back to alpha male to prepare for the finals, so I assume Bisping had pretty much nothing to do with his training and gameplan for that fight.